Improved cast-iron pavement



PATENT OFFICE.

ALONZO FARRAR, OF LONGWOOD, MASSACHUSETTS.

IMPRVED CAST-IRON PAVEMENT.

Specification forming part of Letters Patent No. 9S,480, dated January4, 1870.

To all whom it may concern:

Be it known thatI, ALONZO FARRAR, of Longwood, of the county of Norfolkand State of Massachusetts, have lnade a new and useful invention havingreference to Iron Pavements; and do hereby declare the same to be fullydescribed in the following specification, and represented in theaccompanying drawings, of which- Figure 1 is a top View of a series ofmy improved sections or blocks, as they may be termed, as arranged forcomposing a pavement. Fig. 2 is a top view of one of such blocks orsections. Figs. 3 and 4 are opposite side elevations, and Figs. 5 and 6are opposite end elevations of it. Fig. 7 is an under side view of it.Fig. Sis a transverse section, and Fig. 9alongitudinal section of it.

In some respects each section resembles the grate of a furnace, it beingcomposed of a series of narrow and deep bars, a a, arranged parallel toeach other, and joined by transverse connections b b b, the bars a c abeing extended above the said connections.

One end of the block or section has two tenons, o c, projected fromit,the other end having corresponding mortises or recesses d d made in it.One side of the block also has two narrow tenons, e e, and one widertenon,f, extended from it, each tenou e being a width about one-half ofthat of the tenon f.

From the opposite of the block projections g hg are extended. Each ofthe outer projections g g has a recess, t', formed in it, such recessbeing equal in size to each of the tenons e.

A recess, k, equal in size to the tenon f, is made in the projection h.

Furthermore, the bars a a, as well as each of their connections, isdiminished in size as i they descend, the same being as lrepresented inthe drawings, such being in order to form dovetailed or frusto-pyramidalchambers or spaces between the bars.

After the pavement composed of such sections may have been laid, earth,or a composition of bitumen, or cement and gravel, or broken stone is tobe rammed or lled into the spaces between the bars, and into the saiddovetailed chambers, the latter operating to prevent the earth or thecomposition from being forcedv ont of the chambers or between the barsby frost, or by the action of carriagewheels, or that ot' the feet ofhorses or animals.

ln making a pavement with such sections, they are to be arranged end toend, with the tenons o c of each one entered into the recesses ormortises d d of the next one in advance. Next, another block orsectionshould be laid alongside of each two blocks, so ap plied together as tobreak-joint 7 with them,

the external tenons ee being'placed within the middle recesses k lc ofthe first and second blocks, in which case the larger tenon f willproject into the recesses i z' at the junction of the lfirst and secondblocks.

The third block so applied to the other two will lock them together, soas to prevent them from being drawn apart. At the same time the tirstiand second blocks will support the third block, so that it cannot bedepressed without depressing them.

Finally, therst block, by overlapping the second, or by being tenonedinto it, will be supported by it from being depressed.

By proceeding in this manner to lay .the

blocks or sections, each will be interlocked with those next and aroundit, so as to be supported by them.

When the blocks are laid in a roadway, the bars of each should rangeinadirection across such roadway,in order that the shoes or hoofs ofhorses or animals may be supported to the best advantage while theanimal may be drawing a load.

I claim as my invention- 1. Each pavement-block or grated section madein manner substantially as describedviz., with the series ot' parallelbars, transverse connections having tenons or projections, and recessesor mortises disposed at its sides and ends, in manner as set forth.

2. The block-or section as so made, and as constructed, with its barsand transverse connections, or with either the bars or transverseconnections tapered, in manner and for the purpose substantially asspecified.

ALONZO FARRAR.

Witnesses:

R. H. EDDY, J. R. SNow.

